    SCB1            equ $0000
    FIXMAP          equ $7000
    SCB2            equ $8000
    SCB3            equ $8200
    SCB4            equ $8400

    RAMSTART        equ $100000
    PALETTES        equ $400000

    REG_P1CNT       equ $300000
    REG_DIPSW       equ $300001
    REG_SOUND       equ $320000
    REG_STATUS_A    equ $320001
    REG_P2CNT       equ $340000
    REG_STATUS_B    equ $380000
    REG_DISPENABL   equ $3A0001
    REG_DISPDSABL   equ $3A0011
    REG_SWPROM      equ $3A0013
    REG_BRDFIX      equ $3A000B
    REG_CRTFIX      equ $3A001B
    REG_SRAMLOCK    equ $3A000D
    REG_SRAMUNLOCK  equ $3A001D
    REG_PALBANK1    equ $3A000F
    REG_PALBANK0    equ $3A001F
    VRAM_ADDR       equ $3C0000
    VRAM_RW         equ $3C0002
    VRAM_MOD        equ $3C0004
    REG_HBLANKCNT   equ $3C0006
    REG_HBLANKPOS   equ $3C0008
    REG_IRQACK      equ $3C000C

    BIOSF_BOOTSCR   equ $C00438
    BIOSF_CLEARFIX  equ $C004C2
    BIOSF_CLEARSPR  equ $C004C8
    BIOSF_UPLOAD    equ $C00546

    BIOS_P1CURRENT  equ $10FD95
    BIOS_P1PREVIOUS equ $10FD96
    BIOS_P1CHANGE   equ $10FD97
    BIOS_P1REPEAT   equ $10FD98

    BIOS_SYSSTAT    equ $10FD80
